Question

can be solid, requiring an external flux cleaning agent of rosin if soldering electrical connections or acid if soldering nonelectrical connections. select one: a. solder b. acid - core solder c. rosin - core solder d. tin/lead solder

Explanation:

Solder can be solid and may need an external flux - cleaning agent. Rosin is used for electrical connections and acid for non - electrical connections. Acid - core and rosin - core solders have built - in flux, and tin/lead solder is a type of solder but doesn't specifically address the need for external flux as described.

Answer:

a. Solder